Optimization: Don't draw while the user scrolls

martinrehfeld · Feb 15, 2011 · 858a808 · 858a808
1 parent 1f83cd5
commit 858a808
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Showing 2 changed files with 11 additions and 1 deletion.
diff --git a/public/lib/stream/initplugins.js b/public/lib/stream/initplugins.js
@@ -49,9 +49,16 @@ require.def("stream/initplugins",
           win.bind("hashchange", change); // who cares about old browsers?
           change();
 
+          var scrollTimer;
+          function scrollTimeout() {
+            window.Streamie_Just_Scrolled = false;
+          }
           win.bind("scroll", function () {
             plugin.ScrollState[location.hash.replace(/^\#/, "") || "all"] = win.scrollTop();
-          })
+            window.Streamie_Just_Scrolled = true;
+            clearTimeout(scrollTimer);
+            scrollTimer = setTimeout(scrollTimeout, 1000);
+          });
         }
       },
 

diff --git a/public/lib/stream/status.js b/public/lib/stream/status.js
@@ -470,6 +470,9 @@ require.def("stream/status",
       age: {
         func: function age (tweet) {
           function update() {
+            if(window.Streamie_Just_Scrolled) { // never draw while scrolling
+              return;
+            }
             $('#stream').children().each(function() {
               var tweet = $(this).data('tweet');